BTU to kWh Converter

One british thermal unit equals 0.00029307107 kilowatt-hours (kWh). To convert british thermal units to kilowatt-hours, multiply by 0.00029307107; to go back the other way, multiply by 3412.1416 instead.

The converter above does it as you type and shows the working underneath, so you can check the arithmetic rather than take the number on trust.

What british thermal units and kilowatt-hours actually measure

British thermal unit (BTU) — A British thermal unit raises a pound of water by one degree Fahrenheit — about 1,055 joules. Heating, air conditioning and gas in the US.

Kilowatt-hour (kWh) — A kilowatt-hour is a thousand watt-hours, or 3.6 megajoules. Electricity billing everywhere, and EV battery capacity.

BTU to kWh conversion table

The most common values, worked out in advance. Anything not listed can be typed straight into the converter.

How to convert british thermal units to kilowatt-hours by hand

Multiply the number of british thermal units by 0.00029307107.

For example, 25 BTU × 0.00029307107 = 0.0073267768 kWh.

Going the other way, divide by 0.00029307107 — or multiply by 3412.1416, which is the same thing and easier to do in your head.

Everything runs in your browser

There is no server involved in the calculation. The numbers you type never leave your device, nothing is logged, and the page keeps working with no connection once it has loaded. That is not a marketing line — it is simply how the tool is built, because a calculation like this has no reason to touch a network.